Receiving apparatus for controlling garage doors and lights



Oct. 13, 1953 c. B. TRIMBLE RECEIVING APPARATUS RoR CONTROLLING GARAGE DOORS AND LIGHTS Original Filed March l5, 1946 2 Sheets-Sheet l mu um E: n, M www j H Tw@ N Si I umh INVENTOR.

CEBN B. TH/MHLE /4//5 ATToRNEy Oct. 13, 1953 c. B. TRIMBLE REcEzvzNG APPARATUS FOR CONTROLLING GARAGE DOORS AND LIGHTS Original Filed March l5, 1946 2 Sheets-Sheet 2 INVENTOR.

EBEE/V B. Tlf/MELE BY ///5 ATTOR'N y Patented Oct. 13, 1953 RECEIVING APPARATUS FOR CONTROLLING GARAGE DOORS AND LIGHTS Cebern B; Trimble, Dayton, Ohio Original. application March 15, 1946, Serial'No. 654561,; now Patent No. 2,558,888, dated July Divided. and this application March 17, 1`951,.Sera1'N0. 216,229

This invention relates to a novel receiving ap'- paratus and'r in particular to a receiving apparatusv which can initiate and stop theoper'ation of a' mechanism at will under control. oi'fsigna'l sequences sent'thereto'; which can. control'theI cperation of a further means under control of a modified sequence olsignals; and which can be reset in a normal starting condition, whendesiredi,v in response to-a-special` signal sequence;

This application is a division of United States application Serial No. 654,561, which was 'tiled March 1,5', 19461 and-which issued on July 3, 1851i), as` Patent! No g 2,558388'8;

In orderI that the novell receiving apparatus may be described'more-olearlly,y it'vvvill be described' as` an element offa remotecontroll system for con-- trol-ling'y the operation :ofr a. garage-door-operating meansandflight circuitin@ the garage by sigr l sent from? a sending 'apparatus in: an automobile.

In thefremote'controlsystem, the. sending apparatus is arranged' to send' out'. al preassign'elfl: signal sequence containing a'. predetermined num -v bei" of signals each: consisting; ofY oscillations at aselected frequency, FL. followed by a further number of signalseachconsisting of oscillations at a: different frequency; Fi, which. maybe: followed: bymoresignals atifrequency Fi and .then more at: frequ'ency'Fa, etc'.,. untill the: desired signal' sequence hasbeenff'ormed;

Thenovel receiving. apparatus, which; is usedy with; thefabove sending apparatus', may bev connected'rto the: sendingl apparatus by Wire or'y may becoupled; to. the sending apparatus ,by-either electromagnetic field or an electrostatic field. Electronic. means'watthe receivingapparatus has one portion which is responsive onlyy toY oscillations having a; frequencyv corresponding" to frequency Fi of: the sending; apparatus, and has'a-nother portionwhich is` responsive only tofoscilla'.-- tions; having ai frequency corresponding to irequency. F2 othe r-sending: apparatus.

these frequencies, receive the Various signals which contain these. frequencies andcause rela-ted steppingswitclies tcmake a step. movement eachtimaa signal of their particular frequencyr is` received, whichk switches, together, complete circuit-salto control-relays if the. proper sequence of signalsv has been: received. Thereceiving apparatus can` be readily: changed: to: respond to diierent signal sequences merely by. changing a'k few circuit 'connections'. from the stepping switches totheicontrolrelays The: sending apparatus alsois-.provided with means which can cause a distinctive-signal se- These portions ofthe electronic: inea-ns', whichy respond, to`

g quence to be sentk to the receiving apparatus to causo the receiving apparatus to be operated' to restore various parts of the receiving apparat'us to home or normal position before the sequence of signals is sent thereto, thus insuring that the receiving apparatus will always be set properly before it begins to respond to' the signal sequence and will cause the operation of some further means only if the. proper signal sequence` is' received.

The special restoring signals. may have a par'- ticular characteristic Which distinguishes them from the signals of the signalsequence, or they may consist of a certain preselected combination of signals similar to* those used in the signal se.- quence.

As Will be clear from the following description, the sending apparatus may be arranged'. to send outa signal sequence made up of signalsV consisting of'oscillationsat'any'oneofthree oriniore dif'- ferent frequencies, andI when thisY is done', the' receiving apparatuswill consist of a corresponding number of portions which respond selectively tova'riousfone's ofthe' frequencies. These. various portions will cause stepping switches. toy befr op'- erated according to: the signal'sreceived and effect some desired: control if the required signal sequence has been received;

Thel receiving apparatus of this' embodiment Will be. capable of: responding toa signal sequence using two frequencies and containing preselected numbers of signalsy whichA consist oi oscillations' at either'of theseirequencies;

Thesending apparatus iscoupled to thereceiving apparatus eitherl by an electromagneticv neld Lor by an electrostatic field, depending upon the-- frequencies used intheL signal sequence-x the signalsfbeing radiated froman antennar or. looplocated at the sending apparatus and` being rc'- ceived' byaninput means. or antenna mounted onthe garage, either inside or outside thereof.

Withv thisy antenna arrangement, the signalreceiving means of. the receiving apparatus can'.` be placed in existingfstructures without requiring` that driveways orl other approachesbe tcrnsup to' receive the input' means' or antenna and without requiring that the antenna be placed along drivevvayor approachl This is another important fea-ture when the invention is embodied .in the particular form being described and i'sbeing applied toexisting structures.

It' is an object of the invention, therefore', to provide a receiving apparatuswhich can respond.l tovarious ones of' a plurality of preselected frequencies andi canset up a condition.; upon the receipt of a desired signal sequence, to cause some other apparatus to be operated.

It is a further object of the invention to pro- Vide a receiving apparatus which can respond to a signal sequence to initiate an operation of a mechanism and can respond to a further signal sequence to interrupt said operation of the mechanism before the normal operation thereof is finished.

It is a further object of the invention to provide a receiving apparatus which can respond to one signal sequence to initiate an operation; can respond to a modified signal sequence to initiate said operation and in addition thereto perform a further function; can respond to a further signal sequence to arrest the operation, at will; and can be reset to normal unoperated condition in response to a special signal sequence.

A further object of the invention is to provide a. receiving apparatus which can be adjusted readily to change the controls and enable the receiving apparatus to cause an operation in response to a different signal sequence.

A further object of the invention is to provide a novel receiving apparatus for a remote control system, which apparatus is particularly adapted for use in controlling the opening and closing of closures or garage doors from a vehicle such as an automobile.

With these and incidental objects in View, the invention includes certain nov-el features of construction and combinations of parts, the essential elements of which are set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

In said drawings:

Figs. l-A and l-B, taken together, form a circuit diagram of the receiving apparatus and the means controlled thereby.

General description The novel receiving apparatus is adapted to respond to signals of two types which are sent thereto in predetermined combinations from a sending apparatus. This sending apparatus may consist of an electron-coupled oscillator and a controller which can control the oscillator to cause the oscillator to oscillate selectively at either of two selected frequencies to enable signals, made up of oscillations at either one or the other of these frequencies, to be generated,

The oscillator contains a vacuum tube which is provided with an inductance and capacitance in parallel in its grid circuit, the values of inductance and capacitance being so chosen that they will cause the oscillator to oscillate at a desired frequency Fi to enable signals made up of oscillations at this frequency to be produced. When it is desired to cause the oscillator to oscillate at a different frequency, F2, a second capacitor, which provides an additional capacitance, is connected across the inductance and in parallel with the other capacitance and enables signals made up of oscillations at this second frequency, F2, to be generated.

The controller is a step-by-step operatingl switch which has one portion to control when the additional capacitance will be effective and thus controls the frequency at which the oscillator will operate, and has another portion to determine when the oscillator will operate.

At the end of an operation of the sending apparatus, the switch in the controller Will be l0- cated in its normal or home position. When the switch is given its first step of movement, it connects the second capacitor to a vibrator which is operable to connect the additional capacitance across the inductance and the other capacitance and disconnect it therefrom at a high rate of speed. This causes the oscillator to produce signals made up of oscillations at F1 and signals made up of oscillations at F2 alternately in rapid succession. As long as the switch remains in the position which is one step out of home position, the rapidly alternating signals made up of oscillations at Fi and F2 will be generated. In the embodiment used to explain the invention, these signals will be distinctive from the signals of a signal sequence and will be effective to cause the receiving apparatus to operate and restore various parts thereof to their home or unoperated condition. This restoration of the parts of the receiving apparatus eliminates any error which might otherwise arise due to the unintentional operation of the receiving apparatus by stray signals or static, and insures that the receiving apparatus will respond properly only when the required signal sequence has been received.

After the switch has been in its first position long enough to allow the parts of the receiving apparatus to be restored, it can be given another step of movement to its second position, where a third portion of the switch takes over and causes the switch to operate automatically step by step forward until it resumes its home position. During this automatic operation of the switch, its first-named portion controls the oscillator to produce the signal sequence containing predetermined numbers of signals, each of which signals will contain oscillations at one or the other of the different selected frequencies.

In the instant embodiment, the normal signal sequence for causing an operation of the dooroperating mechanism will consist of three signals, each of which is made up of oscillations at Fi, followed by four signals, each of which is made up of oscillations at F2, then by two signals at Fi, six signals at F2, and finally three signals at Fi. When it is dark and the lights of the automobile are lighted, means in the light circuit of the automobile will modify the control by the rstand second-named portions of the switch to cause an additional signal at F2 to be transmitted following the normal signal sequence, which additional signal will be effective to control the light circuit in the garage to cause the lights in the garage to be lighted or extinguished as required.

If, after an operation of the door-operating mechanism has been initiated, it is desired to stop the operation of this mechanism, the stepping of the switch to its first position out of normal, or restoring position, will, as an incident to the restoring of the parts of the receiving apparatus, cause the operation of the mechanism to be interrupted immediately.

The sending apparatus and the receiving apparatus are coupled by either an electromagnetic field or an electrostatic field which radiates from a coil or antenna located at the front of the automobile each time a signal is generated.

The receiving apparatus operates from the usual E50-cycle alternating current at about 115 volts and contains one portion which is tuned to respond to oscillations at frequency Fi and can receive signals made up of oscillations at this frequency, and contains another portion whicir ist tunedi to respond vto oscillations:4 aty the.:

otherffrequency,v F, and'cantreceive signals maide up-` of oscillations: at this f frequency. Each: pon-'- tion of the receiving apparatus containsla sig:- naleampiifyin'g means', a'.thyratron,.aiirelayg' and alst'epping'switch, and, when a signalliszr'eceived? byfa portion; it.l williiire the thyratron,which' will.`

causeitsrelated'relayl to-operate; to close a cirecuit to the'foperatingfmagnet!ofi its relatedi'stepping switch.V During-i the reception ofi either the normal signal'v sequence or the modified signal sequence, these circuits Willcause the stepping switchrelatedy to'- tlie portion-receiving the sig..- nal'f to` make astep`A of movement yfor each signal' re'ceived' These stepping' switches,` asv they op erate in response to the signals offthesequence; operata auxiliary control relays which, if? the proper vsignal sequenceisfreceived, will causethe operation of the; door-operating mechanism to bei* initiated.

When thesignals atlFiv andthe signalsY atFz'; whichv are sent alternately in rapid succession from the sending apparatusvwhenl th`e1'switch in thel sending apparatus is in its. iirst step yfrom home position, are received, they will cause the relaysin their related portionsto operate;l Due to:V the rapidity of the alternation offthe signals and'7 t'o-thetime lag inI-tlierelease of therelaysf, relays-in both portionswillA be operated atl the simeL time, and; when bothrelavs are thusv opmeans'y tor openv the circuit1to1-the dooreoper-ating' mechanism -toimmediately arrest?` furthermove ment of: the doorthereby;

Thesimultaneous=-operationY of both' relays inI a` restoring oper-ation has been utilized tol cause ther stopping of the* door-operating mechanism" only because itis 'aiV convenientwayf to accom-f plis-htliis result in the embodimentrused to eXf plain the invention. It is obviousetliaty ifd'esirfemy the stopping' function couldj hef` divorced from the :restoringf-uncti'on andilseparate --rneansg con-- trolledl by specialA signal combinations; could? be'.

provided to'aocomplish each of' thesefunctions;v

Whenfthe' automobile lights' are onandI the additional" signa-1f at F2'- is received, it Willrcauselr itsl related 'stepping' switch tooperate vto" a Lposi' tion'vvherey itr canrcause theoper-ati'on of a garage` light circuit controlling means to' cause the lights toL bel lighted or extinguished as required.

Thereceivingfapparatus can readily-be changed' to` utilize different frequencies merely by tuning the portions of" the receiving apparatus to re'-y spond totheseI new' frequencies.

produce a control in'response to a different signal sequence merely by making a fevv` simple changesin the" circuitsbetween the stepping switches-and the auxiliary relays of the receiving devices.

The details` of theE sending apparatus' which is utilized to sendA the various signal sequencestd theA novel receiving apparatus Will notAV be given herein, but reference may be had to said5 appl1 cat-ion Serial No: 654,56l-v for" details e of suclr an Similarly; thereceivingf apparatus can readilyfloel changed to apparatusif desired.' Details ofthe receiving ap paratusf used in the preferred' embodiment: of the inventionfwillf nowf he'y described Detailed description 'I-'he'circuitdiagram for the receivingapparatus and* for the" closure-operating mechanism and,r lightecontrolling circuits controlled thereby: isf:

kInvthe disclosed emhodimentzofy theinvention',l in which the receiving apparatus is used. as` a: parti of a remote control system for controlling.'

thefy initiation. and`A arresting. of the operation` ofl afgarage-dooreoperating means, thefreceiving-'aptparatusfwhichis `very smallandfcompa'ct, can be.

rea'dily m'ountedfin` existinggarages or in newly' constru-cted` onesand can: be operated by. the:v

usual povver` supply, as; 60-cycle alternating? cur., rent-- at1alooutv l1f5` volts.

@nef portionof." the deceiving apparatus-.,isfreasponsive only to signals sent thereto which atei:

madeiup`` of oscillationsl at a` frequency-` correratus.

a circuiti which contains' an inductance coil 6l.

and' a capacitor' 62? andwhicn is-.Yso tuned that it' W1ll`resonate at frequency1 Fi and will allowrtube 60 to become operable only when aLsigna-l madez upvof'oscillations at frequency Filsv received'.

When thesending apparatus and:thereceiving,k apparatus are to be coupled-hyvr an electromagnetic eld, theinput means, whichy will be ther coilfEi, can be mounted on the garage, either inside" or` outsidefthereof, and can'. pick up thesignalsls'ent.` thereto. If an electrostatic couplingfof the:send.'-

ing apparatus and the receiving apparatus," isV to be used, the input means will be a singlevstraight` Wire antenna, which.' can' be. mountedv onk the garage, either inside: or outside thereof. 'This antennaiwould-loeV directly connected topoint 6,3y

in the tunedLcircuit,` which is connectedl to the,

control' grid-'ofi the. t'ube 60.

Regardless f. of Whether theinputl means is aY coilfor straightfwire. antenna, it'can readilyV be" installed' in .existing construction without requiring; extensive; alteration to: theA construction` and without requiring; thatl thel` coil orv antenna: be placed along the driveway orY approach or that the.' driveway or approach be torn up' to. receive thek coil or: antenna', as2 wasv necessary heretofore, asnshown. in thev Unitedl States Patents Nos.;`

1,760,479 and 2,118,93D,'.Whichissued; respectively;

to D. Cclemanf; andE; D; Liljal Thefanode ofi tube 60 derives: its operating po:- tentialr. of: about- 250` volts. D: C.. from the output; of-` a1voltage-doubling:rectien` tube 6,4', which. is;`

operated by the usual (iO-cycle alternating*l cur-- rentiatfa'J voltage of about 115u Volts, which` is suppliediat-ft'erminals 65 and: 66; terminal 6f5ibein'g. 'connectedztox ground;

Included? in, the circuit toftheranodeof tube 60 isa'. primary coil' 'mi ofy aftransformer.

alsotuned` to,J resonate at frequency F1 and is conn'ectedrtofthe control grid of a gaseous elec tron-discharge tube or thyratreir 13 to controle theI iiringA off the thyratron when' signals' at; frequen'cy: E1*` are received; The signal-amplifying tube;ioand*itsncouplingy through the tuned secondary of the transformen to the control grid. of-` the thy-ratten; insurethat the signals'fonthe control gridof the'v thyratronf T32wil1 beof sufficienti Thesec'-vv ondary; coil; 'l l of the.` ytransformer isy included' in;v af circuitwiththe capacitor, l2, which circuit isy strength to cause the thyratron to i'lre and become conducting each time a signal made up of oscillations at frequency F1 is received while the thyratron has positive potential applied to its anode.

The anode of thyratron 13 is connected over conductor 'I4 to terminal 66 and is supplied with an alternating voltage of about 115 volts with respect to the grounded cathode of the thyratron. Whenever its anode is given a sufficient positive potential relative to its cathode, the thyratron 13 will be in operative condition, and, if a signal made up of oscillations at frequency F1 is received at this time, the control grid will allow the thyratron to fire and become conducting.

Once the thyratron becomes conducting, it wili continue to conduct until it is extinguished, which extinguishing action occurs when the potential of its anode relative to its cathode either becomes too small to support conduction or becomes negative.

A relay l is included in the circuit to the anode of the thyratron 'E3 and receives current whenever conduction occurs in the thyratron. The

operating characteristics of the relay are such that the relay is much slower to release than to operate, and it is this slow-to-release characteristic which is utilized during restoring operations of the receiving apparatus, as will be explained more fully hereinafter.

In the receiving apparatus, there is another portion similar to the one just described but which is responsive only to signals which are made up of oscillations at a frequency corresponding to the frequency F2 of the sending apparatus. This portion also contains a signalamplifying vacuum tube 'f6 (Fig. l-A) having its control grid connected to a tuned circuit containing an inductance coil TI and a capacitor 18 and tuned to resonate at frequency F2. As in the case of coil BI, coil 'il can be the input means and can also be mounted on the garage to pick up signals if the sending apparatus and the receiving apparatus are coupled by an electromagnetic field. If the sending apparatus and the receiving apparatus are to be coupled by an electrostatic field, then the input means can be a single straight wire antenna, which can be mounted on the garage and can be connected to the tuned circuit at point 19.

Tube 'I5 also receives its anode potential from the voltage-doubling rectifier tube G4 and has the primary coil 89 of a transformer included in its anode potential supply circuit.

The secondary coil 8l of the transformer is included in a circuit with the capacitor 82, which circuit is also tuned to resonate at frequency F2 and is connected to the control grid of a thyratron 83.

The anode of thyratron 83 is connected over conductor 84 to terminal 65 and is also supplied with an alternating voltage of about 115 volts with respect to the grounded cathode of this thyratron. Whenever its anode is given a sufcient positive potential relative to its cathode, the thyratron 83 will be in operative condition and can be fired and rendered conducting, if a signal made up of oscillations at frequency F2 is received at this time.

A relay 9), which is similar to relay 15, is included in the circuit to the anode of the thyratron 83 and receives current whenever conduction occurs in the thyratron.

The heater laments of the vacuum tubes E0 and 16 and the thyratrons 13 and 83 each have one side, marked with an n connected to one side of a step-down transformer 85, also marked with an n and are supplied with heating current therefrom.

Because the voltage applied to the filaments of thyratrons is also used to provide bias for their control grids to prevent conduction in the thyratrons unless signals are received, the filaments for the thyratrons are suitably connected to the transformer so as to have a potential applied thereto which is degrees out of phase with the potential applied to the anodes. The connections between the points al at the heater laments and the point at the transformer are direct conductive connections which are not shown in Fig. l-A.

The relays l5 and 9D jointly operate to control the operation of a pair of step-by-step operating selector switches of the type which is operated by a magnet and causes a step of operation to occur upon each release of the magnet.

One of the selector switches, SS, is related to the portion of the receiving apparatus which responds to signals which are made up of oscillations at frequency F1. This first selector switch has a selector portion SS-l (Fig. l-A), consisting of a bank of contacts and a wiper which is grounded and which can make contact with the contacts of the bank, one after another in succession, to set up circuit conditions to auxiliary relays after certain predetermined numbers of operations of the switch. This selector switch also has a homing portion SS-Z, consisting of a bank of contacts and a wiper which engages the contacts one after another in succession as the switch is operated step by step. This portion, when rendered effective, can cause the switch to be stepped forward step by step automatically until the switch is in home position. The wipers of portions SS-I and SS-Z of this selector switch are shown in their home position in Fig. 1-A.

The Wipers of portions SS-I and SS-Z are insulated from each other but are connected together for rotary movement and are stepped past the contacts of their related banks by an operating magnet SSM, which is effective, through the usual magnet armature operated pawl-andratchet drive, to cause the wipers to make one step of movement upon each restoration of the magnet armature to unoperated condition after it has been operated.

The other selector switch, TS, is related to the portion of the receiving apparatus which responds to signals which are made up of oscillations at frequency F2. This second selector switch has a selector portion TS-I, consisting of a bank of contacts and a wiper which is connected over conductors 9| and 84 to the ungrounded terminal 56 and which can make contact with the contacts of the bank one after another in succession to complete circuits through auxiliary control relays and the selector portion SS-I of the rst selector switch after certain predetermined numbers of operations of this second selector switch. This second selector switch also has a homing portion TS-Z, consisting of a bank of contacts and a wiper which engages the contacts one after another in succession and is operable, when rendered effective, to cause the switch to be stepped forward step by step automatically until the switch is in its home position. The wipers of portions TS-I and TS-2 of this selector switch are shown in their home positions in Fig. l-A.

The wipers of portions TS-l and TS-2 are also faces-,coe

vinsulated from eachLot-herbutare connecteddor njoint rotary-movement-to lmake one step of move- 15a, unoperated relay contact gilm-windingofoperating magnetSSM and-backto -point\98. The

potential between points -95 and 98 is abouti-25 `volts D. C. -andwill cause AmagnetSSlVLto be energized -whenrthiscircuit isclosed. yMagnetSSM will rrremain energized until relay ST is released after `the particular signal-Which .is-madefup -of oscillations at frequency F1 has beenreceived vUpon `deenergization oflmagnet SSM, ithe 1 wipers in portions SS-l and SS-'2willmake Loneestep `of Amovementclockwise l(Fig. 1-A). yIt will :be

A-noted that kthe above circuit tov magnet SSM---ex- #tends vover unoperated contacts of relay l9!) and 'Wouldnot have beencompleted by the-operation of relay -1-5 `if relay vSill -hadbeen energized-and had moved -contact LSila to its operated position beforecontact "a was moved `to--its*operatedfposition.

VIn a similar manner, when asignatwhich -is made up of oscillations =at 'SF2 is received, relay 190 f will -be .operated #to complete Ethe operating circuit for switch-operatingmagnet TSMsif relay 15 has not'been operated. The circuitcompleted -by the operation -of 'relay Lil!) extends vfrom point '95, which `is Aconnected vto `the epositive side of the `rectifier 92, over kthe 1winding of -rnagnet TSM, .Aunoperated relay contact-'152), and-oper- -ated relay ycontact i901) lto point v98, ywhich is connectedrto the negative side ofvthe -rectier 182. yIf 'relay 15 has been -energizedand `contact 15b had r been operated `when -relay 90 was energizedfrelay 15 would have interrupted-melenergizing circuit to TSM.

Accordingly, in vthe `normal*operation of relay 1115, it-will complete the `circuitvto itsrelated magl :netsSSMat-contact*15a and will interruptethe `circuit to magnet TSM at fcontactlilb,r and simivlarlyf-relay 9G will complete the circuitto vits related magnet TSM at contact e901) and will `:interrupt the circuit yto magnet fSSMat contact Y A clear understanding of theffunctiomof :these selector switches .will be had lby considering :their ioperationduring the reception-0f -the 4particular `normal and .modied signal .sequences used in the instant embodiment and rexplainedfearlier herein.

After the .receiving apparatus has-'been restored .to normal or :home position, theoperationfof an Operate kswitch in.fthe.fsending-.ap paratus Will initiate-the automatic .sending'fof either ,a normal .or `a vrnodieol signal sequence. As thesesignals are .received 'bysthereceiving .apparatuafthe rst threesignals, whichare-made up of oscilla-tions at ffrequency F1, wi1l,through signal-amplifying tube 6.0 and .t'thyratron 13, @cause relay 'I 5 to operate three ,times .to energize .the operating magnet SSM .three ltimes :to `.cause ,the lwiper of portion SSA torna-kefthreefsteps of movement and engage the contact A in -athe conductor Sd, point 91T, operatedfrelaycontact *l5 `1() position ,marked A; where-it connects/.ground to'conductor |08 (Figs. .LA .and 1.-B),-whichris v-connectedltoone side of .auxiliarycontrolrelay Irl `(Fig. 1-A). The .nextffonr signalsfof the sequence, which .are .madeup of oscillationslat frequency F2, .Will, .through the signal-amplifying .tubel landffthethyratrcn Q3., cause relay .i to operate four times v. to energize-tlie-operating magnet TSM fof the other y.selector.switch vfour times Lto :cause the wiper of portion TS-fl .ftolmalre four. stepscf movement.; and engagethe Ycon-tact kin --position marked fB, from .which contact .a .conductor 4H12 y(Figs. leA and 1.1-.iB) extendstofthe. otherside of the :auxiliary control relay IUI.

"Snceithe .Wipersinzportion 1TS-I isfconnected to sthe ,ungrounde'd ,potential `supply terminale kandthe wiperinlportionSSel .is connected to ground -when the A.wipers 4are ,in .positions B and A, respectively, they will complete-theienergizing circuit for fthe..auxiliary cont-rol :relay L0 I :and will. cause this .relay-toj operate.

`fIhewauxiliary controlrelay AHH .of .the type .infwhich its-contacts, onceoperated, Willremain docked in -operatedposition even though thelenergizing :circuit/to :the relay is interrupted :and .until .a special v.restoring .magnet is ...operatedlto unlock the contacts.

-Upon receipts .of three vvsignals made up :of oscillations at .F1 and 4fourlsignals made up..l of oscillations at F2, therefore, auxiliary control reglay .1.0i ytwill be operated, and its `contacts .|101a fand {0l-b will .fbe locked .in :operated position.

.After V four .signals f which C.are .made f up of .-oscillations at A.frequency F2 thave been received,

v.the .-nextftwo signals, whichare madeup otoscillations at frequency F1, will cause the wiper .of portion .SS-I to move two steps farther .and

engagefcontactcin .position marked 0;Which `contact. isconnected over..c.0nductor 103 to one sideo`f a. second auxiliarycontrol relay fUlLxthe .other side .fof which lrelay is.. connected ato l.con-

ductor.l0.2...extending to the contactfintheposition marked "B in-the portion ,'ISel .andupon `whchthe wiper .has remained. .'Ihemovement Jof 1fthe wiper of portion. SS-.I into engagement with :the contact .in the .position ymarked fffiC .completes the fenergzine lcircut for the `second -.-auxil.iary..-contro1.relay ,11.04, whose `contacts lMa .:Inontiwithitheoontaotn position marked -.D,

Qwhich .contact ismconnected over conductor H15 `(Flies 211A anale-B) toroneside of athirdauxli- @rylrelay L.Lilli the other .side v:of which. relayfis Connected-over:conductor L03 tooorltact iii-:positionfmarked in portion vSS-l.. Since 7the meer .ineportion SS-l doesinot moveiromthe Contact .inroston marked f C, While .the .wiper finrportion TRS-:il .is movinesx .fstepsinto engage- ;ment .wigthxthe contact in .position marked ..D, the' movement :of ythe Wiper fof portion {ITS-.I into :engagement .with Contact `in position .marked f'Dwill mplete the energizing circuit-for the rthirdauxiliaryoonirolreley.4.013, Whoseloontaots 406.@ and 10.6.2 .operaterano are :lookedfoporated position.

.-Atfthis :stage of the i operation v.of fthe reooring repporatusltho three-.auxiliary control .relaysaw-I Maand 10.6. will -fharofolosod .their .contacts :UM-.a and @lilla Ilma and #0.412, and flpllacandxlb.

After the six signals which are made up of oscillations at frequency F2 have been received, the last three signals of the normal signal sequence, which signals are made up of oscillations at frequency F1, Will cause the wiper in portion SS-I to make three further steps of movement to engage the contact in position marked E and apply ground thereto. The contact in the position marked E is connected over conductor 109 (Figs. l-A and l-B), closed contacts 101a, 104:1, and 1060i, and conductor 110 to one side of relays 111 and 112, which initiate the oper- -ation of the door-operating mechanism when operating potential is supplied to the other side of their windings.

The door-operating mechanism may be of any suitable and well-known type, and, as shown schematically in Fig. l-B, includes a reversible motor 1 15 adapted to drive a door-actuating device 116.

Also included in the door-operating mechanism is a switching device 11'1, which is set by the actuating device to either of two positions, depending upon whether the door has been moved to closed or open position. As the actuating device 116 moves the door to closed position, suitable means thereon, as a lug 118, will engage the switching device 111, which is of the snap-switch type, and will move the switching device 11'1 into engagement with the contact 119, which is connected to relay 111. This is the condition shown in Fig. l-B. As the operating device 1 16 moves the door to open position, other means thereon, as lug 120, will engage the switching device and snap it over into engagement with contact 12, which is connected to relay 112.

The switching device 11'1 is connected over conductors 122 and 84 to the ungrounded terminal 66 (Fig. 1-A), so that, with the door in closed position and the switching device ll'l in the position shown in Fig. l-B, operating potential will be applied to relay 1 1 1. The circuit for relay 1 1 1 extends from terminal 66 (Fig. l-A), over conductors 84 and 122, switching device 111, contact 1 19, winding of relay 1 1 1, conductor 1 10, the contacts 106e, 104a, 101a, and conductor 109 to contact in position marked E in portion SS-I, which contact is connected to ground over the wiper which has moved into engagement therewith. Energization of relay 111 will initiate a door-opening operation.

With the door in open position, the switching device 111 will be in engagement with the contact 121, and the circuit to relay 1 I2 will be completed in a similar manner when the wiper in portion SS-I engages the contact in the position marked E after the switches 101a, 104a, and 106e have been closed. Energization of relay 1 12 will initiate a door-closing operation.

When relay 1 I 1 is energized, it closes three contacts, 111a, 11 1b, and 111e, of which contact 111a. completes a holding circuit to ground, contact 111b grounds one side of one winding of the motor over conductor 125, which will cause the motor to operate in that direction which opens the door, and contact 111c completes a circuit to cause the portion SS-2 of the selector switch to be effective to cause the stepping of the selector switch forward to home position in a manner to be described later herein.

Motor 115 has operating potential applied thereto by being connected to the ungrounded terminal 66 (Fig. 1-A), over point 126, conductor 12'1, contacts 101D, 1041), 106i), and conductors f 122 and 84 and will operate when relay 111 grounds conductor |25 at contact 1 1 1b.

When relay 1 11 has initiated the operation of the motor 115 to open the door, the motor will, unless otherwise controlled, continue to drive the actuating device 116 until the lug 120 shifts the switching device 11'1 to open the circuit to relay 111, which becomes deenergized and removes ground from conductor 125 at contact 1 1 1b and thereby stops the motor.

The energization of relay 112 produces a result similar to that provided by relay 1 11; however, contact 112b applies ground to one side of another winding of the motor 115 over conductor 128, which causes the motor to run in the opposite direction and drive the actuating device 116 in the direction necessary to close the door. Contacts 112e and 112C perform functions similar to contacts 11 1a and 111e; namely, provide a. holding circuit for the relay and complete a circuit to cause the portion SS-Z of the selector switch to be effective to step the switch forward into its home position.

It is clear from the above that, upon receipt of the proper normal signal sequence, the dooroperating mechanism will be set in operation to open or close the garage door as required. It is also clear that the door-operating mechanism can be set in operation in response to a different signal sequence merely by changing the connections from the auxiliary control relays 101, 104, and 106 and conductor 109 from the contacts marked A, and B, C, D, and E in Fig. l-B to other contacts as required by the diierent signal sequence. Accordingly, the receiving apparatus can readily be preset to respond to any desired signal sequence.

When either relay 111 or 112 is energized and closes contact 111c or 112c, it will render the homing portion SS-2 of the first selector switch operable to cause this switch to be stepped forwardly automatically until it reaches its home position. This is accomplished as follows. When contact 111e or 112e is closed, it connects a circuit from the positive side of the rectifier 92 (Fig. l-A) over point 95 and conductor 96 (Figs. 1-A and 1-B) to conductor 130 and wiper in portion SS-2.

It will be recalled that wipers in portions SS-I and SS-Z move in unison, so that, when the wiper in portion SS-l is in engagement with the contact in the position marked E, the wiper in portion SS-2 will be in engagement with a contact in a corresponding position in its related bank of contacts. As seen in Fig. l-A, contacts in positions 2 through 24 in portion SS-2 are connected to a conductor 131, which is connected to one side of the winding of the operating magnet SSM over a normally closed contact 132, which is opened each time the operating magnet SSM is energized.

The circuit traced above from the positive side of the rectier 92 over conductor 96, contacts 111e or 112e, and conductor 130 continues over the wiper and the remaining contacts of its related bank as the wiper engages them in succession, conductor 131, contact 132, winding of operating magnet SSM to point 98, which is connected to the negative side of the rectifier 92. This circuit will cause the operating magnet SSM to step the wipers forward until they reach their home position, as shown in Fig. 1-A, in which position the contact of the bank is not connected to conductor 131 and stops the automatic operation of the switch.

'.13 This :automatic 'homing operation. of ,fthe selec,- tor switch moves .the wiperin the portion `SS.;| from the contact inl position marked .E. and :re-

`movesground fromlconductor |09 toprevent an .improperenergization of vrelay orfI-IZ when the 4switching device is/snapped from one position tothe other near the `endof an operation ofthe-actuatingY device 6.

l.'Ihe.operation of `the garageedoor-operating mechanismV canalso be initiatedhy .the momentary closing of a manuallyfoperable Start key |45 (Fig. 'l-B), .located atthe :garage or at any othersuitable placawhich"I key closes contact |46, which .grounds .the conductor .i lextending to lrelays |||..and ||2,.and.also closes Contact |41, ^which suppliesoperatingpotential l.to the motor |5 byconnecting'the motor to ungrounded ter.-

.minal 66, over point.|2,6, conductor |,2,`|,conduc ytor |46,.contact |47, and conductors |49, |22, amd64.

Aholding relay |50 in a circuit betweenpoint |26 .and conductor .H0 is energized .when the .Start.keygroundsconductor andy also ap- 4-plies operating potential to point |26. Relay |50 -atits contact |50a connects point |26 directly :to-.conductor |49 to by-pass the contact |.41fxto .maintain operatingvpotential on the-motor after Ithe' key |:415ihas been released.

'.A manually-operable Stop key |55 (Figi-A),

-located at thegarage` or in any other suitable :place, when.A operated, connects operating potenstial .to `a conductor |51 (Figs. l-A .and 1B), :which is. connected to one side of a release relay J|56 (Fig. 1-B),the .otherside of which relay is connected..toground. -When .the Stop key |55 f \is operatedfrelay: |56 will operate and ropen con- 'tact |'56a in the. circuit of relay |50 to cause relay |50 fto be `deenergized toppen contact |50a in -the potential-supplying circuitifor the motor l5, Athereby stopping the motor and the garage-doorvthe .signals .corresponding to the normal signal sequence will cause the door-operating mechanism .tofoperata and the additional signal will causethe .wiper in portion rTS-| to` move one step farther to. engage the contact in position marked ""F 4and place operating potential on this contact. :Conductor |35 (Figs. lfA and l--B connectsthe contact in the position marked F to one side of a garage light circuit controlling re1ay|36 (Fig. l-B) the other side of which rela-y 'is'. connected over conductor |31 (Figs. .l-A and l-B) to a contact |38 in theportion'lSS-.I and is connected to ground when the vwiperin portion SS-l -engagescontact |38 near the end of the homing Aoperation of this selectorswitoh. 'Ihis causes the relay |36 to be energized'shortly .after the operation of the door-operating'mechanism has'been initiated.

-When relay |136 operates, it is eiiective through afpawl |39 and a ratchet |40 to operate the cam 14| one step vto control the shiftingof fthe blade |.42pto1selectively engagecontactsMB or |44 in the garage light circuit. The blade |42 and the contacts |43A and |44 form one switch in the Wellknown three-way circuit used-to. control the.A circuit to thel garagelightsand enablefthecontrol from the -automobile Itofcause the lights to either turned oli or on as required. .The :light circuit lalso includesa manuallyfoperable .switch Mza.

As explainedearlier herein, thesendingapparatus, `with the controller .in f its rstposition out of.normal-or home position, sends foutsignals Amadeup of. oscillations .fatvFi and signals made up of. oscillations .atFa lfv/hichi SignaIsare alternated rapidlyzin succession. These rapidly-alternating signals operate the Yreceiving apparatus :to-nre- -store .various Vparts thereof to .home or normal position-beforeeither the normal orthemodied signal sequence ris sentito the receiving apparatus. .This restcrationofthe partsof the receiving apparatus willeliminate anyerroneousisetyting of the receivingiapparatus which mighthave beendue to unwantedreception of stray signals cir-static and will insure that the lreceivilig-apfparatus will respondproperly to thesignals of the .signal sequence.

nThetwo types of signals alternateiwithwsuch speed-that at leastone signal-which isrnadefuup of .'oscillationsat l'frequency F1 and one -vsignal which is made up oioscillationsat frequency F2 will bereceived inthepositive half of Aeach cycle of alternating potential applied to :thefanodes of thyratronsf'il and 83, causing both-thyratrons to be fired in each cycle. :Asthe thyratrons 1.3

I`and i3 conduct, they Yenergize rtheir respective relays 'l5 and v90, causing bothrelaysto-*beoperated at about the same time.

Even though the -thyratrons i3 andialare'ex- -tinguished and current :flou/therethrough isinterrupted during thenegative halfofeach .cycle of alternating potential applied to their anodes, lthe relays `|5 and ..90 `willremain operated =be cause the time required for the armatures of the relays to lea-ve their operated position, .after current isinterrupted to their winding, exceeds that time .during which potential onthe anodes is negative.

With both relays p15 and 190 operated .at the same time, a circuit is completed tof one V.side-fof restoringrelays |56, |63, |64, and.|.65 fromconductor 'la (Fig. l-A), over conductor |60, operated. Contact "|56, conductor |.6|, operated'contact o, conductor |62,:and conductorJS'I. AThis circuit applies operatingpotential .to-oneside of the restoring relays |56, |63, |54, vand |65 (Fig. l-B), which relays have their other .sides connected to :ground and become energizedwhen potential is applied by this circuit over contacts 75e and 30o. Relay |56 interrupts the circuit to the holding relay |50 at contact. |56a, andrelay |50 opens the potential-.supplying circuit tofthe motor-'l I5 at contact Milla. Relays |63, |64,.and |65, `.when operated, unlock contacts |0|a and |0|b, |04a and |6427, and [06a .and |1061) of the auxiliary control re1ays|-0||04,.:an'd |06, allowing .thesecontacts zto open and ,interrupt the circuits whichv extend. thereover.

kThis interruption ofI the circuits overcontacts I0|a-and |0|b, |04a, and |104b, |6611. and |0617, Aand over contact la will ystop the operation ofthe motor.l l tand Willarrest anyfurther movement of the door, thusenalbling the operation .ofthe door-operating mechanism to `be .arrested by a control sent from the automobile.

",While the energization cfthel restoring 'relays |56, |63,4 |611,l and |65, which ycauseytlie operation of the door-operating mechanism to be'interrupted, is shown .as a part ,of the resettingoperation, it is .obvious thatthe circuit toitheserelays Could be fccmpietedby some .other signalsinstead of by the special restoring signals if the interruption of a door operation were to be dvorced from the restoring operation.

The simultaneous operation of relays I and 9G also completes circuits to the homing portions SS-Z and TS-2 to cause the selector switches to be stepped forward to their home positions.

The circuit -to the homing portion SS-2 extends from the positive side of the rectier 92 (Fig. l-A) over point 95, conductor 96, point 91, operated contact 15a, operated contact 99a, and conductor to the wiper of portion SS-2. If this selector switch is not in home position, the wiper will be engaged with one of the contacts connected to conductor |3|, and the circuit will continue ovel` contact |32 and the winding of operating magnet SSM to point 98, which is connected to the negative side of the rectifier 92. This circuit will cause the wipers SS-l and ESS-2 to be stepped forward into their home position, where wiper in portion SS-Z engages a contact which is not connected to conductor |3| and stops further movement of the wipers. If this selector switch is in home position as a result of a previous operation of relay or ||2, the circuit over operated contacts 75a and 90a will have no effect thereon.

The circuit to the homing portion TS-2 extends from the negative side of the rectiner 92, over point 98, conductor operated contact 90b, operated contact b, and conductor |12 to the Wiper of portion TS-2. If the selector switch is not in home position, the wiper will be in engagement with one of the contacts connected to conductor |13, and the circuit will continue over contact |1111, the winding of operating magnet TSM to point 95, which is connected to the positive side of the rectier S2. This circuit will cause wipers in portions TS-I and TS-Z to be operated step by step until they engage the contacts in home position, the contact in home position in portion TS-2, not being connected to conductor |13, interrupting the homing circuit to operating magnet TSM.

It is clear from the above description that, When the signals which are made up of oscillations at FI and the signals which are made up of oscillations at F2 are received alternately in rapid succession, relays 15 and 9|) will be operated concurrently and will complete circuits to the restoring relays |56, |63, lt, and |65 and to the homing portions SS-2 and 'TS-2 of the selector switches, to interrupt any operation of the door-operating mechanism which might be taking place, and to restore the Various parts of the receiving apparatus to home or normal position in readiness to receive the signals in the normal signal sequence or in the modified signal sequence, the signals in the normal signal sequence causing an operation of the door-operating mechanism to take place, and the signals in the modied signal sequence also causing an operation of the dooroperating mechanism and in addition thereto causing an operation of the garage light circuit.

It is clear that the circuit conditions which are set up in the receiving apparatus upon the receipt of the normal signal sequence or the modified signal sequence to cause relay or ||2 to operate and initiate any operation of the garagedoor-operating mechanism in the embodiment given to illustrate the invention could readily be used to either operate or control the operation of some other mechanism, and that the additional signals of the modiiiecl signal sequence, which control the operation of the garage light circuit 16 controlling means, could operate or control the operation of some other desirable mechanism.

While the form of the invention shown and described herein is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to corinne the invention to the one form or embodiment disclosed herein, for the novel remote control system is susceptible of embodiment in various forms all coming within the scope of the claims which follow.

What is claimed is:

l. In a remote control system for controlling the operation of a door-operating mechanism from a vehicle in response to a signal sequence of groups of each of two types of signals, the different types of signals consisting of oscillations at one or another of predetermined frequencies and the groups consisting of selected numbers of signals, with the type of signal alternating for successive groups, a receiving apparatus including the combination of input means for receiving signals sent thereto from the vehicle; an electronic means connected to said input means and responsive to signals which are made up of oscillations at one of said frequencies; differentially operable means which are operated under control of this electronic means and given an increment of movement each time one of these signals is received; other electronic means connected to said input means and responsive to signals which are made up of oscillations at the other of said frequencies; diiferentially operable means which are operated under control of said other electronic means and given an increment of movement each time one of these signals is received; and control means connected to the two dillerentially operable means and jointly controlled by said two differentially operable means after each group oi signals is received during the reception of the signal sequence and rendered effective to initiate an operation of the dooroperating mechanism when the differentially operable means have been operated by the particular combination of signals in the signal sequence.

2. In a remote control system for controlling a lighting circuit in a garage in response to a special signal sequence sent from a vehicle, the combination of a three-way circuit for controlling the garage lights, including a manually-operable switch and another switch jointly operable to control the opening and closing of the circuit; means to cause the operation of said other switch to selectively close or open the circuit to the garage lights; and means operable in response to the signals of a special signal sequence to cause an operation of the switch-operating means, whereby the lights of the garage can either be lighted or put out, as required, selectively by the manual switch or in response to control signals sent from the Vehicle.

3. In a remote control system for controlling the operation of garage-door-operating mechanism of a garage in response to a signal sequence of groups of each of two types of signals sent from a vehicle, the diferent types of signals consisting of oscillations at one or another of predetermined frequencies, and the groups consisting of selected numbers of signals, with the type of signals alternating for successive groups, a receiving apparatus mounted in said garage, said receiving apparatus including input means mounted on the garage for receiving the signals sent thereto from the vehicle, including means connected to the input means and responsive to signals of said one 17 type which aremade upof oscillations at one of said frequencies, including -means connected to the input ,means and responsive tofsignals of said other type which are made up of oscillations at the other of said frequencies, including' differentially operable means operated diiierent-'extents according'tothe vnumber of signals of lsaid one type in the various groups and operated by the means responsiveto signals of said one type to advance one step eachtime one of these signals is received; `including 'differentially operable means operated different extents-according to the number 'of signals lof'said other type 'in the various groups and operated by the means re- `sponsive to signals of' said other type to advance one step each time one of these signals is received, and including control means jointly controlled by said two dinerentially operable `means in different positions thereof duringthe reception ofthe signal sequence and rendered effective to initiate an operation ofthe-door-'operating mechanism when the differentially operable means have been operated by the particular combination of signals in the signal sequence.

Il. In a remote control system for controlling the operation of garage-door-operating mechanism of a garage in response to a signal sequence 'of groups of each of two types of signals sent :from a vehicle, the different types of signals consisting of oscillationsat one or another 'of predetermined frequencies and the groups consisting of selected numbers vof signals,'wlth the type of signal alternating for's'uc/cessive groups, a receiving apparatus, said receiving 'apparatus including a portion which contains a signal pick-up coil mounted at the garage' for receiving the signals sent thereto from the vehicle, contains electronic means connected to the coil and relsponsive to signals of said one type which are made up of oscillations at one of said frequencies, l

and contain diierentially operable means operated one step under control' of the electronic Vmear'is each time oneof said signals is received and occupying a diferent predetermined position after each group of signalsof said one type has been received, said receiving' apparatus including another portion'which containsfa pick-up coil mounted at the garage for picking up signals sent thereto from the vehicle, contains electronic means connected to the coil and responsive to signals of said other type which are made up of oscillations at the other of said frequencies, and contains differentially operable means operated one step under control of the electronic means each time one of these signals is received and occupying a different predetermined position after each group of signals of said other type has been received, and said receiving apparatus including control means jointly controlled by said two difierentially operable means in the various positions thereof as the groups are received and rendered effective to initiate an operation of the door-operating mechanism when the difierentially operable means have been operated by a predetermined combination of signals in the signal sequence.

5. in a receiving apparatus for causing a desired control to be effected in response to a signal sequence consisting of a predetermined combination of groups of each of two types of signals, the groups consisting of selected numbers of signals with the type of signal alternating for successive groups, the combination of input means for receiving the signals; an electronic means connected to the input means and responsive to signals of onetype;y differentially operable means Voperated under control of thisrelectronic means to makean 4increment of movement@ eachtime one of these signals `-is received; other lelectronic meansconnected to said input means and respon-- sive to signals off-the other type; differentially [operable means which are `operated under -control of said other electronic meansto make an increment of movement each time one'of/fthese signals of'said other type--is receivedfcontrol means yjointly controlled'byfsaid two-"differentially operablemeans during'the reception of the signal sequence; and an operating'circuit completed by the controlmeanswhen the predeterminedy combination of groups of signals has been `received. f 6. The apparatus of claim 5 in which eachdifuilerentially operable meansincludes a bankof contacts and a Wiper moved'step by `step to engage various contacts of the bank, the wiper engaging a predetermined contact` of the-bank at the end of thereception of each of its related *groups ofsignal'sr n f 1 -f v7; The apparatus of claim 5 in whichthe control means includes a pluralityv of relays con- 'nected to thetwo` diierentially operable means to be energized therefrom,"a diierent one of the r'elaysibeing energizedl after the second groupof signals and'eachgroup of vsignals thereafter if the'proper' numbers of signals to make up" the predetermined combination are' included in the various groups. f l

S. 'The' apparatus of yclaim 5 in whicheach of the" diierentially operablemeans includes a bank of contacts and: a Wiper moved' vstrep bystep to engage the contacts as the signals of a related group are received; the wiper 'engaging a predetermined contact at the endof the reception of each group; and in whichthecontrolmeans includes a plurality of relays connected to variousonesof' saidpredeterminedcontacts "to be energized thereovena diierent one oil said relays being energized after y,the second groupand each succeeding grQllp has been received if 7theproper 53 number` of signalshaveb groups., i

9. In a receiving apparatus ,forco'ntrolling vthe initiation and'interruption of an operation in response to differentsignal sequences sent thereto, one"`signalsequence .containing ,groupsv of selected numbers of either of two types of signals with the type of signal alternating in successive groups, and the other signal sequence containing the two types of signals alternating in rapid succession, the combination of a normally open circuit which is adapted, when closed, to produce the desired operation; means responsive to signals of said one type; means responsive to signals of said other type; diierentially movable means controlled by the means responsive to said one type of signal to be given an increment of movement each time one of said type of signals is received; differentially movable means controlled by the means responsive to said other or" said types of signals to be given an increment of movement each time one of said other type of signal is received; control means jointly controlled by the differentially operable means in their respecive positions as each of the groups of signals is received and operable to close said operating circuit if the said one signal sequence has been received; and means jointly controlled b-y the two means which are responsive to the signals and operable when said other nff included in, the y signal sequence is received to open the operating circuit.

10. In a receiving apparatus for controlling the initiation of an operation in response to a signal sequence containing a predetermined combination of signals of one or another type and formed by groups of signals containing selected numbers of signals with the type of signal alternating in successive groups, said receiving apparatus being capable of being reset in response to a diierent signal sequence containing the two types of signals alternating rapidly in succession, the combination of a normally open circuit which, when closed, causes said operation; means responsive to signals of said one type; means responsive to signals or" said other type; means diierentially movable from a starting condition under control of the means responsive to said one type of signal, said differentially operable means being given one increment of movement for each of said one type oi signals which is received; further means differentially movable from a starting condition under control of the means responsive to said other type of signal, said further dilerentially operable means being given one increment of movement for each o1 said other type of signal which is received; control means including a plurality of self-locking relays energized from the two diierentially operable means as the signal sequence is received, one of said relays being energized after the second group and after each succeeding group has been received if the proper number of signals have been included in the groups, said relays causing the operating circuit to be closed; resetting means controlled jointly by the two means which respond to the signals and operable, when the two types of signals are received alternately i-n rapid succession, to cause the differentially operable means to be returned to their starting ycondition and the locked relays to be released.

11. In a receiving apparatus for causing different controls to be effected in response to diiTerent signal sequences received thereby, the sequences being made up of predetermined combinations of signals of two types, the combination of a normally open circuit which, when closed, serves as the operating circuit for a mechanism; means operable in response to said two types of signals; means operated by the means responsive to the signals and eective upon receipt of one signal sequence made up or a predetermined combination of signals of said two types, to close said operating circuit; and means operated by the means responsive to the signals, and effective upon receipt of another signal sequence made up of a diierent predetermined combination of signals of said two types, for opening said operating circuit; said apparatus enabling the ,if

initiation and interruption of an operation to be controlled from a remote location by signal sequences sent thereto.

12. In a remote control system for controlling a garage-door-operating mechanism and a garage-lighting circuit in response to signal sequences sent from a vehicle, said signal sequences being made up selectively of two types of signals, one of said types of signals being formed by oscillations at one preselected frequency and the other of said types of signals being formed by oscillations at another preselected frequency, one of said signal sequences being a normal signal sequence which is made up of groups of various predetermined numbers of signals of said one type and groups of various predetermined numbers of signals of said other type, with the type ci signals for successive groups of signals alterhating until the normal signal sequence is coinpleted, and ancther of said signal sequences being a modified signal sequence which is sent out 'when the car lights are lighted, said modied gnal sequence being made up of said normal gnal sequence and an additional predetermined umber of signals of the type opposite the last ype of the normal signal sequence, the combination of a receiving apparatus including means responsive to signals of said one type, including means responsive to signals of said other type, two means in the receiving apparatus being operated differentially by the signals of their respective types, said receiving apparatus also including means jointly controlled by the dii-ferentially operable means to initiate an operation of the garage-door-operating mechanism, and including a garage-light-controlling means jointly controlled by the initiating means, when operated to initiate an operation of the door-operating mechanism, and by the differentially operable means which responds to signals of the additional signals, if the proper predetermined number of signals has been received, to be operable when these conditions are fulfilled; and a three-way garage light circuit jointly controlled by a manually operated switch and by a switch. controlled by the light-controlling means to either light or put out the garage lights, as required, under control of either the manually operable switch or the switch operated by the lightcontrolling means in response to signals sent out from the vehicle.

CEBERN B. TRIMBLE.

References Cited in the le or" this patent UNITED STATES PATENTS Number Name Date 366,124 McElroy July 5, 1887 529,532 Scribner Nov. 20, 1894 1,760,479 Colman May 27, 1930 1,815,045 Boddie et al July 2l, 1931 2,041,079 Lyle May 19, 1936 2,095,688 Ballentine Oct. 12, 1937 2,465,925 Purrington Mar. 29, 1949 

